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Open Life Sciences

formerly Central European Journal of Biology

Editor-in-Chief: Ratajczak, Mariusz

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Volume 4, Issue 3


Volume 10 (2015)

New approach in studies of microalgal cell lysis

Maja Berden-Zrimec / Jasmina Logar / Alexis Zrimec / Luka Drinovec / Mladen Franko / Alenka Malej
Published Online: 2009-07-26 | DOI: https://doi.org/10.2478/s11535-009-0018-0


A new approach to the studies of the microalgal cell lysis by utilizing a combination of two complementary methods is presented. Delayed fluorescence (DF) is a measure of the living algal biomass, detecting only cells with active photosynthesis. Thermal lens spectrometry (TLS) detects the total pigment amount released from lysed cells. Both methods select for photosynthetic organisms, reducing possible background from other sources (e.g. heterotrophic bacteria, zooplankton, and abiotic substances). The DF/TLS method was tested with a laboratory Skeletonema costatum culture exposed to a geometric dilution series of the lysing factor poly- APS. The exposure resulted in similar EC50 values for DF intensity, TLS and dissolved esterase activity of 0.8±0.2, 1.77±0.35, and 1.25±0.1 mg poly-APS l−1, respectively. The combined DF/TLS method enabled a rapid evaluation of the living vs. dead cells without any sample pretreatment or manipulation.

Keywords: Phytoplankton; Cell lysis; Thermal lens spectrometry; Delayed fluorescence; Carotenoids; Photosynthesis

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About the article

Published Online: 2009-07-26

Published in Print: 2009-09-01

Citation Information: Open Life Sciences, Volume 4, Issue 3, Pages 313–320, ISSN (Online) 2391-5412, DOI: https://doi.org/10.2478/s11535-009-0018-0.

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© 2009 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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